From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:33551) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1evKWG-0002it-0B for qemu-devel@nongnu.org; Mon, 12 Mar 2018 06:17:29 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1evKWD-0006dL-45 for qemu-devel@nongnu.org; Mon, 12 Mar 2018 06:17:27 -0400 From: Anton Nefedov Date: Mon, 12 Mar 2018 13:16:52 +0300 Message-Id: <1520849818-6915-4-git-send-email-anton.nefedov@virtuozzo.com> In-Reply-To: <1520849818-6915-1-git-send-email-anton.nefedov@virtuozzo.com> References: <1520849818-6915-1-git-send-email-anton.nefedov@virtuozzo.com> MIME-Version: 1.0 Content-Type: text/plain Subject: [Qemu-devel] [PATCH v8 3/9] quorum: set supported write/zero flags List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Cc: qemu-block@nongnu.org, kwolf@redhat.com, mreitz@redhat.com, eblake@redhat.com, den@virtuozzo.com, berto@igalia.com, Anton Nefedov Signed-off-by: Anton Nefedov --- block/quorum.c | 20 ++++++++++++++++++++ 1 file changed, 20 insertions(+) diff --git a/block/quorum.c b/block/quorum.c index 14333c1..dc77a23 100644 --- a/block/quorum.c +++ b/block/quorum.c @@ -867,6 +867,20 @@ static QemuOptsList quorum_runtime_opts = { }, }; +static void quorum_set_supported_flags(BlockDriverState *bs) +{ + BDRVQuorumState *s = bs->opaque; + int i; + + bs->supported_write_flags = BDRV_REQ_FUA; + bs->supported_zero_flags = BDRV_REQ_FUA | BDRV_REQ_MAY_UNMAP; + + for (i = 0; i < s->num_children; i++) { + bs->supported_write_flags &= s->children[i]->bs->supported_write_flags; + bs->supported_zero_flags &= s->children[i]->bs->supported_zero_flags; + } +} + static int quorum_open(BlockDriverState *bs, QDict *options, int flags, Error **errp) { @@ -961,6 +975,8 @@ static int quorum_open(BlockDriverState *bs, QDict *options, int flags, } s->next_child_index = s->num_children; + quorum_set_supported_flags(bs); + g_free(opened); goto exit; @@ -1029,6 +1045,8 @@ static void quorum_add_child(BlockDriverState *bs, BlockDriverState *child_bs, s->children = g_renew(BdrvChild *, s->children, s->num_children + 1); s->children[s->num_children++] = child; + quorum_set_supported_flags(bs); + out: bdrv_drained_end(bs); } @@ -1064,6 +1082,8 @@ static void quorum_del_child(BlockDriverState *bs, BdrvChild *child, bdrv_unref_child(bs, child); bdrv_drained_end(bs); + + quorum_set_supported_flags(bs); } static void quorum_refresh_filename(BlockDriverState *bs, QDict *options) -- 2.7.4